Hi can some one tell me who makes the GM 6.5L turbo diesel year 1995 and is it a good engine.Has there been any problems with this motor.

Who makes it = General Motors.

"Is it a good engine", "Have there been any problems": Your best bet is to read through the FAQs and various threads. The short answer is YES, if you don't overheat it or boost it way beyond specifications. Yes, there have been problems, as with any mechanical device. It is NOT a modern duramax/cummins/powerstroke, if that is what you seek. It is a proven and reliable design that puts out a moderate amount of torque (360-400 ft-lbs) in stock trim, and is one of the most common light-duty truck engines ever made, used in pickups, SUVs, vans, buses, motor homes, etc. I think that the superior attributes going for it are:

* Very common = easy to find parts and mechanics
* reliable when run conservatively = lots of people have 400K+ miles on their engines
* easy to modify if you want to tinker = there are a lot of tuner parts for this engine
* still in production by AM general = still new parts being made
* used by the military = the current military hummer uses a NA version of the 6.5. = durable, reliable under extreme conditions.

Hope this helps you. Read the FAQs.

Sincerely,

Rob :)

Military and Civilain Hummers also use the turbo version. Mechanical pump for the Military version, tronic for the civies.

according to my brother in law all the military hummers are non turbo. Most of the hummers are 6.2's as well, with only the last couple of orders having 6.5 NA diesels in them. He is a captian in the army and just returned from the front lines in Iraq. As far as who designed the 6.2/6.5, it was originaly designed by Detriot Diesel for GM as back in '82 when the 6.2 came out Detriot Diesel was a division of GM. The 6.2/6.5 diesels got a bad rep from the GM Olds 350 diesel conversion (5.7L) The put diesel heads on a Olds 350 block and it was for the most part a big boat anchor. My 82 6.2 na diesel runs well, its in a 3/4 ton camper special with 4:10 gears in the rear. Just dont expect it to be a powerstroke or a cummins turbo diesel. I have owned both of them and they are bigger $$$ to work on and many parts are not avaible from parts stores, but GM parts are everywhere. Change the fuel filters at least once a year and change the oil every 3k and use shell rotella T diesel oil, not your regular gas engine oil and they will run a long time. When you pull in to refuel, let her idle a couple of minutes to allow the heads to cool down after a long freeway run, GM diesels tend to get hot at the firewall end of the heads because of the design of the intake and cooling system, that is where they tend to blow head gasgets. Of all the diesels I have owned growing up on the farm, the GM's have been the most trouble free and easiest to fix. Just my 2 cents. Mike

Mike, The GM 5.7 was designed as a diesel. It was not converted. It had a unique block, crank, rods, heads, cam, etc. Yes, it resembled the 350 Olds gas engine. The valve covers and front timing cover were a few of the retro pieces.

The 350D and DX were ok, if used as intended. That was, light duty, hiway fuel economy. The had inherent design flaws. Some of which, still exist in today's designs. (Not enough head bolts, etc) Once early casting flaws (cracked cranks) and improvments to the block (deeper main bearing thread bosses, harder head bolts, roller cams, etc) were made, it became a reasonably reliable piece. Many are still on the road with thousands of miles behind them.

I have two with 240,000+ miles on them. They're fun! A PITA to put head gaskets in, but still fun. Fred

Mike, as a veteran, who made frequent trips to the motor pool, and a deployment to Kosovo, I can tell you 100% that ALL the uparmored humvee's have 6.5 turbo diesel engines with mechanical injection pumps.

All of the light skinned HMMWV (which includes your brother in-law's 'command' hummer) are 6.2 N/A diesels.

Mike, as a veteran.....I can tell you 100% that ALL the uparmored humvee's have 6.5 turbo diesel engines with mechanical injection pumps.


Im doubting the 100% fact, but with the same or better qualifications I can second that the newer hmmwvs in service do have the 6.5TD in them. There are defently non armored versions with it as well.(my personal favorite!:cool: )

Things may have changed since I got out in Feb '03.

They must of added the turbo to deal with the extra weight, all of the ones in his platoon were straight 6.2 or 6.5 na diesels. Glad to see they uped the power to deal with the weight.

It was a definite must, uparmored models weigh about 5 tons, and thats not including crew and equipment or whatever they might have to tow.

Things may have changed since I got out in Feb '03.

nah, they were around in some areas quite a bit before Feb 2003.


They must of added the turbo to deal with the extra weight, all of the ones in his platoon were straight 6.2 or 6.5 na diesels. Glad to see they uped the power to deal with the weight.

it wasnt so much that, just the new lot of hmmvws had them. when your fleet is mainly 6.2L and 6.5L N/A and a shortage is happening (the war), then all of a sudden a bunch of the 6.5L TD types are sent out, first un-armored, then later armored. before the later, up-armoring happend on most available ones..6.2/6.5N/A and what few 6.5TD was available. up-armoring is good for some reasons, mainly more counterproductive. especially when you say "to deal with the weight" thats in my opinion of course, im sure plenty will disagree, go right ahead. It was a definite must, uparmored models weigh about 5 tons, and thats not including crew and equipment or whatever they might have to tow.